Hauptseminar Symplektische Geometrie

In my talk I will discuss a result stating that, under certain conditions, the braid type of a set of periodic orbits of a Hamiltonian surface diffeomorphism is stable under perturbations that are sufficiently small with respect to the Hofer metric. This yields interesting dynamical applications. For example, one obtains that the topological entropy is lower semi-continuous on the group of Hamiltonian diffeomorphisms on a closed surface with respect to this metric. All this is joint work with Marcelo R.R. Alves.

Hinweis: Comment: The seminar can be reached using the link https://us02web.zoom.us/j/83511688971?pwd=SGpDU1J1V29FSkd4dmxCTEp6S3JzQT09

Mittwoch, den 9. Februar 2022 um 11:15 Uhr, in Zoom, Online Mittwoch, den 9. Februar 2022 at 11:15, in Zoom, Online